The following issue has been SUBMITTED.
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https://cmake.org/Bug/view.php?id=15829
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Reported By: Julien Bigot
Assigned To:
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Project: CMake
Issue ID: 15829
Category: Modules
Reproducibility: always
Severity: major
Priority: normal
Status: new
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Date Submitted: 2015-11-03 12:12 CET
Last Modified: 2015-11-03 12:12 CET
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Summary: GenerateExportHeaders does not work for C
Description:
This is a duplicate of issue 0012959 that has been closed as fixed but is not.
The module GenerateExportHeader creates some defines that work for C but it
require C++ to be enabled in order to be used. Indeed, the macro
check_cxx_compiler_flag is used in many places. That means you can't use
project(name C).
A fix for this is proposed in comment 0035809 of issue 0014456
Steps to Reproduce:
This example will not works:
project(mylib C)
include(GenerateExportHeader)
add_compiler_export_flags()
add_library(mylib mylib.c)
generate_export_header(mylib)
[...]
-- Performing Test COMPILER_HAS_HIDDEN_VISIBILITY
CMake Error at /usr/share/cmake-3.3/Modules/CheckCXXSourceCompiles.cmake:76
(try_compile):
Unknown extension ".cxx" for file
/[...]/CMakeFiles/CMakeTmp/src.cxx
try_compile() works only for enabled languages. Currently these are:
C
See project() command to enable other languages.
Call Stack (most recent call first):
/usr/share/cmake-3.3/Modules/CheckCXXCompilerFlag.cmake:50
(CHECK_CXX_SOURCE_COMPILES)
/usr/share/cmake-3.3/Modules/GenerateExportHeader.cmake:223
(check_cxx_compiler_flag)
/usr/share/cmake-3.3/Modules/GenerateExportHeader.cmake:371
(_test_compiler_hidden_visibility)
CMakeLists.txt:6 (generate_export_header)
[...]
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Issue History
Date Modified Username Field Change
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2015-11-03 12:12 Julien Bigot New Issue
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